import java.util.*;
public class exam {
  	public static void main (String args[ ]){
	 	Scanner reader = new Scanner(System.in);
	 	double sum = 0;
		int m = 0;  
	 	while(reader.hasNextDouble()){        
		    	double x = reader.nextDouble(); 
	     		assert x< 100:"DEFAULT";       
		        assert x>0:"DEFAULT";
			m = m+1; 
	     		sum = sum+x;
		}    
	   	System.out.printf("%d个数的和为%f\n",m,sum);
		System.out.printf("%d个数的平均值是%f\n",m,sum/m);
  	}
}
